Sectional pipe-covering



(No Model.) v R. W. LYSLE.

SEGTIONAL PIPE COVERING.

Lil

ROBERT XV; LYSLE, OF PHILADELPHIA, PENNSYLVANIA.

SECTIONAL PIPE-COVERING.

SPECIFICATION forming part of Letters Patent No. 589,903, datedSeptember 14, 1897.

Application filed February 24, 1897. Serial No. 624,861, (No model.)

To all whom it may concern.-

citizen of the United States, residing at the .city of Philadelphia, inthe county of Philadelphia and State of Pennsylvania, have inventedcertain new and useful Improvements in Sectional Pipe-Coverings, &c. ,ofwhich the following is a specification.

My invention has relation to a pipe-covering formed of two or moresections of plastic non-conducting material-such'as magnesia,plaster-ofparis, or infusorial earthcombined or mixed with asbestos; andin such connection it relates particularly to the construction andarrangement of such covering for pipes or somewhat analogous purposes.

The principal object of my invention is to provide a sectionalpipe-covering of plastic non-conducting material having a substantiallytubular form to fit closely and surround the pipe to be insulated, theinterior of the sections of said covering being recessed, grooved, orindented, so as to form a'series of air chambers or boxes interposedbetween the pipe and the covering to assist the insulating properties ofthe covering and to decrease the .amount of material used in theformation of said covering.

My invention, stated in general terms, consists of a sectionalpipe-covering constructed and arranged in substantially the mannerhereinafter described and, claimed.

The nature and scope of my invention will be more fully understood fromthe following description, taken in connection with the accompanyingdrawings, forming part hereof, in which-- Figurel is a perspective Viewof a sectional pipe-covering embodying the main features of myinvention, the covering being shown in open position ready forapplication to a pipe; and Fig. 2 is a perspective view of the cover ingin closed position when surrounding a pipe, the end of the coveringbeing shown as sectioned through the line a; w of Fig. 1.

Referring to the drawings, a represents the sections of the covering,being preferably two in number, the material of the covering beingpreferablya plastic composition, such as plaster-of-paris with,asbestos, cork, or fibrous material. Each section is semicylindrical,and the inner periphery c is provided with a series ofannularly-arranged recesses or grooves 6L2, separated from each other bywide ridges a forming firm bearingsurfaces for the covering upon thepipe. The grooves a of onesection do not extend entirely around theperiphery of the section and do not form with the corresponding groovesof the other section a continuous ring shaped box, but the grooves areseparated from each other bylongitudinally-arranged ridges a Therecesses 6L2 may alsobe arranged so that those ofone section do notoccupy a position opposite to those of the other. On the outside of thesections a is placed a layer of fabric 1), adapted to be wrapped aroundthe sections to bind the same into circular or tubular form when thesections surround or jacket the pipe (I; Bands 6 of metal are preferablyused to secure the fabric 6 and the sections a in closed position, asillustrated in Fig. 2. By thus recessing, indenting, channeling, orgrooving the interior of each section a a series of air boxes orspacesare formed, which assist in the insulating properties of the coveringand at the same time decrease the amount of composition used in thecovering. coveringis lighter, cheaper, and more efficient than acovering not having such recesses formed therein for constitutingair-cells, entrapped air being known to be the fundamental principle ofan efficient non-eondud tor of heat. Then by the reduction in thequantity of material employed due to the formation of the interveningair-entrapping spaces or recesses therein a saving of from twenty totwenty-five per cent. in the cost of such a covering is effected Withoutsacrificing in the least the efficiency of such covering in application.

Having thus described the nature and objects of my invention, what Iclaim as new,

and desire to secure by Letters Patent, is

Hence my improved sponding grooves of the two sections being Intestimony whereof I have hereunto set separated from each other bylongitudinallymy signature in the presence of two subscrib- 10 arrangedridges, the arrangement being such ing witnesses.

that when the two sections inclosea pipe the I ,I 1 T 5 grooves of onesection are Wholly separated P JRrl L1 or disconnected from the groovesof the other \Vitnesses: section, substantially as and for the purposesJ. \VALTER DoUGLAss, described. THOMAS M. SMITH.

